const path = require('path');
const webpack = require('webpack');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');

// const isProduction = process.env.NODE_ENV === 'production';

module.exports = {
  target: 'web',

  entry: {
    main: path.resolve(__dirname, 'src', 'index.jsx'),
  },

  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].[chunkhash].js',
    publicPath: '/',
  },

  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules(?!\/myuimodule)/,
        use: ['babel-loader'],
      },
      {
        test: /\.s?[ac]ss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'sass-loader'],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ['file-loader'],
      },
      {
        test: /\.(woff|woff2|eot|ttf|otf)$/,
        use: ['file-loader'],
      },
    ],
  },

  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify(process.env.NODE_ENV),
      },
    }),
    new HtmlWebpackPlugin({
      inject: false,
      template: path.join('src', 'index.html'),
      title: 'Title',
    }),
    new MiniCssExtractPlugin({
      filename: '[name].[contenthash].css',
      chunkFilename: '[name].[contenthash].chunk.css',
    }),
  ],

  resolve: {
    extensions: ['.js', '.jsx', '.css', '.scss'],
  },

  devServer: {
    stats: 'minimal',
    historyApiFallback: true,
    contentBase: path.resolve(__dirname, 'dist'),
    proxy: {
      '/api': 'http://localhost:5000',
    },
  },

  optimization: {
    occurrenceOrder: true,
    runtimeChunk: true,
    splitChunks: {
      cacheGroups: {
        vendors: {
          chunks: 'all',
          name: 'vendor',
          test: 'vendor',
          enforce: true,
        },
      },
    },
    minimizer: [new UglifyJsPlugin({}), new OptimizeCSSAssetsPlugin({})],
  },
};